The fatigue life analysis of turbine blades in the air cycle machine

In recent years the turbine blades of air cycle machine in MA60 often damaged. In order to analyze the fatigue life of the turbine blade in the high speed rotating air cycle machine, we establish the fluid-solid coupling model of turbine blades. Through the FSI module in ANSYS workbench, the result of fluid field is introduced into the solid domain, by the simulation analysis of solid domain getting the stress distribution of the turbine blade. Then make the stress distribution of turbine blades in N-code for fatigue analysis. We can get the results of simulation and the test results is in an acceptable error range, the fatigue of danger is the root of turbine blade and the hole of turbine blade. It shows that this method is feasible to simulate the fatigue life of turbine blades, and provides a feasible way for the analysis of fluid mechanical fatigue life. Through practical engineering application, the analytical method above can provide valid approach for life design of turbine blades.